Oil well layered water plugging anti-jacking pressure relief process pipe column

• Main Authors: SI GAOFENG, TENG XIAOLONG, WANG XIANGLI, YANG JING
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses an oil well layered water plugging and top pressure relief prevention process pipe column, which comprises an oil pipe, and is characterized in that a bottom boundary protection packer is connected below the perforation bottom boundary of the oil pipe, and a top pressure relief prevention mechanism is connected to the lower end of the oil pipe; the bottom boundary protection packer is used for packing an oil jacket annulus; the anti-jacking pressure relief mechanism is provided with a pressure relief channel; in the lowering process of the pipe column, the pressurerelief channel is closed and used for blocking the oil pipe; when a tubular column is unplugged and sealed, the pressure relief channel is opened and used for circulating pressure in a well into the oil tube from the oil sleeve annulus and discharging well liquid in the oil tube into the oil sleeve annulus. The problems that in the unsealing process of an existing oil well layered water plugging process pipe column, the h